<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像区域 -->
      <div class="avatar_box">
        <img src="../assets/logo.png" alt />
      </div>
      <!-- 登陆表单区域 model:表单数据对象 rules:表单验证规则 ref:表单对象，通过this.$refs.名称获取 -->
      <el-form
        label-width="0px"
        class="login_form"
        :model="loginForm"
        :rules="loginFormRules"
        ref="loginFormRef"
      >
        <!-- 用户名 prop:验证规则 v-model:数据对象-->
        <el-form-item prop="username">
          <el-input v-model="loginForm.username" prefix-icon="iconfont icon-user"></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input
            v-model="loginForm.password"
            prefix-icon="iconfont icon-3702mima"
            type="password"
          ></el-input>
        </el-form-item>
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登陆</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data () {
    return {
      // 登陆表单数据绑定对象
      loginForm: {
        username: '',
        password: ''
      },
      // 表单验证规则
      loginFormRules: {
        username: [{
          required: true,
          message: '请输入用户名',
          trigger: 'blur'
        }, {
          min: 3,
          max: 10,
          message: '长度在 3 到 10 个字符',
          trigger: 'blur'
        }],
        password: [{
          required: true,
          message: '请输入密码',
          trigger: 'blur'
        }, {
          min: 3,
          max: 10,
          message: '长度在 3 到 10 个字符',
          trigger: 'blur'
        }]
      }
    }
  },
  methods: {
    resetLoginForm () {
      // 重置表单
      this.$refs.loginFormRef.resetFields()
    },
    login () {
      // 登陆首先对表单进行预验证
      this.$refs.loginFormRef.validate(async valid => {
        // 验证不通过直接返回
        if (!valid) return
        // async 修饰异步函数 await 优化对象
        // res 直接获取对象中data
        const {
          data: res
        } = await this.$http.post('login', this.loginForm)
        // const res = {
        //   data: {
        //     id: 500,
        //     rid: 0,
        //     username: 'admin',
        //     mobile: '123',
        //     email: '123@qq.com',
        //     token: 'Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1aWQiOjUwMCwicmlkIjowLCJpYXQiOjE1MTI1NDQyOTksImV4cCI6MTUxMjYzMDY5OX0.eGrsrvwHm-tPsO9r_pxHIQ5i5L1kX9RX444uwnRGaIM'
        //   },
        //   meta: {
        //     msg: '登录成功',
        //     status: 200
        //   }
        // }
        if (res.meta.status !== 200) return this.$message.error('登陆失败！')
        this.$message.success('登陆成功')
        // 将后台返回的token储存到客户端的sessionStorage中
        window.sessionStorage.setItem('token', res.data.token)
        // 通过编程式导航跳转主页
        this.$router.push('/home')
      })
    }
  }
}

</script>

<style lang="less" scoped>
.login_container {
  background-color: #2b4b6b;
  height: 100%;
}

.login_box {
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 3px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}

.avatar_box {
  height: 130px;
  width: 130px;
  border: 1px solid #eee;
  border-radius: 50%;
  padding: 10px;
  box-shadow: 0 0 10 #ddd;
  position: absolute;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: #fff;

  img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background-color: #eee;
  }
}

.login_form {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}

.btns {
  display: flex;
  justify-content: flex-end;
}
</style>
